<template>
  <a-layout>

    <a-layout-content
            :style="{ background: '#fff', padding: '24px', margin: 0, minHeight: '280px' }"
    >
      <a-row :gutter="24">
        <a-col :span="8">
          <p>
            <a-form layout="inline" :model="param">
              <a-form-item>
                <a-button type="primary" @click="handleQuery()">
                  查询
                </a-button>
              </a-form-item>
              <a-form-item>
                <a-button type="primary" @click="add()">
                  新增
                </a-button>
              </a-form-item>
            </a-form>
          </p>
          <a-table
                  v-if="level1.length > 0"
                  :columns="columns"
                  :row-key="record => record.id"
                  :data-source="level1"
                  :loading="loading"
                  :pagination="false"
                  size="small"
                  :defaultExpandAllRows="true"
          >
            <template #name="{ text, record }">
              {{record.sort}} {{text}}
            </template>
            <template v-slot:action="{ text, record }">
              <a-space size="small">
                <a-button type="primary" @click="edit(record)" size="small">
                  编辑
                </a-button>
                <a-popconfirm
                        title="删除后不可恢复，确认删除?"
                        ok-text="是"
                        cancel-text="否"
                        @confirm="handleDelete(record.id)"
                >
                  <a-button type="danger" size="small">
                    删除
                  </a-button>
                </a-popconfirm>
              </a-space>
            </template>
          </a-table>
        </a-col>
        <a-col :span="16">
          <p>
            <a-form layout="inline" :model="param">
              <a-form-item>
                <a-button type="primary" @click="handleSaveDoc ()">
                  保存
                </a-button>
              </a-form-item>
            </a-form>
          </p>
          <a-form :model="doc" layout="vertical">
            <a-form-item>
              <a-input v-model:value="doc.name" placeholder="名称"/>
            </a-form-item>
            <a-form-item>
              <a-tree-select
                      v-model:value="doc.parent"
                      style="width: 100%"
                      :dropdown-style="{ maxHeight: '400px', overflow: 'auto' }"
                      :tree-data="treeSelectData"
                      placeholder="请选择父文档"
                      tree-default-expand-all
                      :replaceFields="{title: 'name', key: 'id', value: 'id'}"
              >
              </a-tree-select>
            </a-form-item>
            <a-form-item>
              <a-input v-model:value="doc.sort" placeholder="顺序"/>
            </a-form-item>
            <a-form-item>
              <a-button type="primary" @click="handlePreviewContent()">
                <EyeOutlined /> 内容预览
              </a-button>
            </a-form-item>
            <a-form-item>
              <div id="content"></div>
            </a-form-item>
          </a-form>
        </a-col>
      </a-row>

      <a-drawer width="900" placement="right" :closable="false" :visible="drawerVisible" @close="onDrawerClose">
        <div class="wangeditor" :innerHTML="previewHtml"></div>
      </a-drawer>

    </a-layout-content>
  </a-layout>


</template>
<script lang="ts">
    import {createVNode, defineComponent, onMounted, ref} from 'vue';
    import axios from 'axios';
    import {message, Modal} from 'ant-design-vue';
    import {Tool} from "@/util/tool";
    import {useRoute} from "vue-router";
    import ExclamationCircleOutlined from "@ant-design/icons-vue/ExclamationCircleOutlined";
    import E from 'wangeditor';


    export default defineComponent({
    name: 'AdminDoc',
    setup() {
      const route = useRoute();
      const param = ref();
      param.value = {};
      const docs = ref();
      const loading = ref(false);

      // 因为树选择组件的属性状态，会随当前编辑的节点而变化，所以单独声明一个响应式变量
      const treeSelectData = ref();
      treeSelectData.value = [];

      const columns = [
        {
          title: '名称',
          dataIndex: 'name',
          slots: { customRender: 'name' }
        },

        {
          title: 'Action',
          key: 'action',
          slots: { customRender: 'action' }
        }
      ];


      /**
       * 一级文档树，children属性就是二级文档
       * [{
       *   id: "",
       *   name: "",
       *   children: [{
       *     id: "",
       *     name: "",
       *   }]
       * }]
       */
      const level1 = ref(); // 一级文档树，children属性就是二级文档
      level1.value = [];



      /**
       * 数据查询
       **/
      const handleQuery = () => {
        loading.value = true;
        level1.value=[];
        axios.get("/doc/all/" + route.query.ebookId).then((response) => {
          loading.value = false;
          const data = response.data;
          if(data.success){
            docs.value = data.content;
            console.log("原始数组",docs.value)

            level1.value=[];
            level1.value=Tool.array2Tree(docs.value,0);
            console.log("树形结构",level1)

            // 父文档下拉框初始化，相当于点击新增
            treeSelectData.value = Tool.copy(level1.value) || [];
            // 为选择树添加一个"无"
            treeSelectData.value.unshift({id: 0, name: '无'});
          }else {
            message.error(data.message);
          }
        });
      };


      // -------- 表单 ---------
      const doc = ref();
      doc.value = {
        ebookId: route.query.ebookId
      };
      const modalVisible = ref(false);
      const modalLoading = ref(false);
      let textEditor: E;

      const handleSaveDoc = () => {
        modalLoading.value = true;
        doc.value.content = textEditor.txt.html();
        // setTimeout(() => {
        //   modalVisible.value = false;
        //   modalLoading.value = false;
        // }, 2000);
        axios.post("/doc/save", doc.value).then((response) => {
          modalLoading.value = false;

          const data = response.data;
          if(data.success){
            // modalVisible.value = false;
            message.success("保存成功！");
            //重新加载列表
            handleQuery();

          }else {
            message.error(data.message)
          }
        });
      };

      /**
       * 将某节点及其子孙节点全部置为disabled
       */
      const setDisable = (treeSelectData: any, id: any) => {
        // console.log(treeSelectData, id);
        // 遍历数组，即遍历某一层节点
        for (let i = 0; i < treeSelectData.length; i++) {
          const node = treeSelectData[i];
          if (node.id === id) {
            // 如果当前节点就是目标节点
            console.log("disabled", node);
            // 将目标节点设置为disabled
            node.disabled = true;

            // 遍历所有子节点，将所有子节点全部都加上disabled
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              for (let j = 0; j < children.length; j++) {
                setDisable(children, children[j].id)
              }
            }
          } else {
            // 如果当前节点不是目标节点，则到其子节点再找找看。
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              setDisable(children, id);
            }
          }
        }
      };

      /**
       * 内容查询
       **/
      const handleQueryContent = () => {
        axios.get("/doc/find-content/" + doc.value.id).then((response) => {
          const data = response.data;
          if (data.success) {
            textEditor.txt.html(data.content)
          } else {
            message.error(data.message);
          }
        });
      };



      /**
       * 编辑
       */
      const edit = (record:any) => {
        // 清空富文本框
        textEditor.txt.html("");
        modalVisible.value = true;
        doc.value=Tool.copy(record);
        handleQueryContent();

        // 不能选择当前节点及其所有子孙节点，作为父节点，会使树断开
        treeSelectData.value = Tool.copy(level1.value  );
        setDisable(treeSelectData.value, record.id);

        // 为选择树添加一个"无"
        treeSelectData.value.unshift({id: 0, name: '无'});
      };

      /**
       * 新增
       */
      const add = () => {
        // 清空富文本框
        textEditor.txt.html("");
        modalVisible.value = true;
        doc.value = {
          ebookId: route.query.ebookId
        };
        treeSelectData.value = Tool.copy(level1.value) || [];

        // 为选择树添加一个"无"
        treeSelectData.value.unshift({id: 0, name: '无'});
      };

      const deleteIds: Array<string> = [];
      const deleteNames: Array<string> = [];
      /**
       /**
       * 删除
       * 查找整根树枝
       */
      const getDeleteIds = (treeSelectData: any, id: any) => {
        for (let i = 0; i < treeSelectData.length; i++) {
          const node = treeSelectData[i];
          if (node.id === id) {
            // 如果当前节点就是目标节点
            console.log("delete", node);
            // 将目标ID放入结果集ids
            // node.disabled = true;
            deleteIds.push(id);
            deleteNames.push(node.name);

            // 遍历所有子节点
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              for (let j = 0; j < children.length; j++) {
                getDeleteIds(children, children[j].id)
              }
            }
          } else {
            // 如果当前节点不是目标节点，则到其子节点再找找看。
            const children = node.children;
            if (Tool.isNotEmpty(children)) {
              getDeleteIds(children, id);
            }
          }
        }
      };

      /**
       * 删除操作
       * @param id
       */
      const handleDelete = (id:number) => {
        // 清空数组，否则多次删除时，数组会一直增加
        deleteIds.length = 0;
        deleteNames.length = 0;
        getDeleteIds(level1.value, id);
        Modal.confirm({
          title: '重要提醒',
          icon: createVNode(ExclamationCircleOutlined),
          content: '将删除：【' + deleteNames.join("，") + "】删除后不可恢复，确认删除？",
          onOk() {
            // console.log(ids)
            axios.delete("/doc/delete/" + deleteIds.join(",")).then((response) => {
              const data = response.data; // data = commonResp
              if (data.success) {
                // 重新加载列表
                handleQuery();
              }
            });
          },
        });
      };

      // ----------------富文本预览--------------
      const drawerVisible = ref(false);
      const previewHtml = ref();
      const handlePreviewContent = () => {
        const html = textEditor.txt.html();
        previewHtml.value = html;
        drawerVisible.value = true;
      };
      const onDrawerClose = () => {
        drawerVisible.value = false;
      };


      onMounted(() => {
        handleQuery();
        textEditor = new E('#content');
        textEditor.config.zIndex = 0;
        textEditor.create();
      });

      return {
        param,
        // docs,

        level1,

        columns,
        loading,
        handleQuery,
        handleSaveDoc,
        handleQueryContent,

        edit,
        add,

        doc,
        modalVisible,
        modalLoading,
        treeSelectData,

        drawerVisible,
        previewHtml,
        handlePreviewContent,
        onDrawerClose,

        handleDelete
      }
    }
  });
</script>

<style scoped>
  img {
    width: 50px;
    height: 50px;
  }
</style>